Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 196
r wrought iron, draw a 450 spacing line as for cast iron, layoff 732 lengths and draw (in ink) the light line; then, using theeye for the spacing, draw a heavy line about l/n below each light line. For steel, use the eye for the spacing and draw two fine linesabout 732 apart, and space the pairs of… … 178 MECHANICAL DRAWING. For copper, draw the pencil-lines denning the blank spacesand ink directly, approximating a yi6 space between lines. Aluminum and wires are to be inked directly, with approxi-mate spacings. Brick and stone are to be accurately blocked out in pencil,inked in, then the…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-476-189.webp)
